Electrically operated cutter for cutting the armor of armored cable



Sept. 20, 1966 w. A. M DOWELL ELECTRICALLY OPERATED CUTTER FOR CUTTINGTHE ARMOR 0F ARMORED CABLE Filed June 5, 1964 INVENTOR.

i0 WJZZK/W (4 United States Patent 3,273,236 ELECTRICALLY OPERATEDCUTTER FOR CUT- TING THE ARMOR 0F ARMORED CABLE William A. McDowell, 266Randolph Ave., Emerson, NJ. Filed June 5, 1964, Ser. No. 372,767 1Claim. (Cl. 30-905) My invention is directed toward an electricallyoperated cutter for cutting the armor away from armored cable to exposethe conductors therein.

It is an important object of the invention to provide an electricallyoperated cutter for cutting the armor of armored cable which is simpleto operate and economic-a1 to produce.

Another object is to provide a new and improved cable cutter wherein thedepth of cut into the cable armor can be varied as described.

Still another object is to provide a new and improved cable cutter[having a pistol grip and a trigger switch whereby the cutter can beoperated in one hand.

All of the foregoing and still further objects and advantages of myinvention will now be explained with reference both to thisspecification and to the drawing wherein:

FIGURE 1 is a partially cut away, side elevational view of my invention;

FIGURE 2 is an enlarged fragmentary bottom view thereof;

FIGURE 3 is an enlarged fragmentary opposite side view thereof;

FIGURE 4 is a front view thereof; and

FIGURE 5 is an exploded view of certain parts thereof.

Referring now to the drawing (FIGURES 1-5), there is shown a horizontalhollow casing having a vertical pistol grip 12 extending downwardtherefrom. Casing 10 contains an electric motor 14 having a horizontaldrive shaft 16 extending from one end therefrom.

A two conductor electric cable 18 connected at one end to plug 20extends through the grip 12, one conductor 22 going directly from grip12 into casing 10 to make contact with one terminal 24 of the motor, theother conductor 26 being connected to a movable contact 29 controlled bytrigger 30 (which is spring loaded at 32). A second fixed contact 28 isconnected by still another conductor 34 to a second terminal 36 on motor10. When the grip is held in one hand and trigger 30 is depressed, themotor is energized (providing power is supplied to plug 20), and driveshaft 16 turns. When finger pressure on trigger 30 is released, thespring forces trigger 30 outward to break the connection betweencontacts 28 and 29 to turn the motor off.

A second casing 40 is connected to casing 10. Shaft 16 extends intocasing 40* and terminates in a first bevel gear 42. A second bevel gear44 at right angles to gear 42 is engaged therewith. Gear 44 carries ahorizontal shaft 46 extending transversely of shaft 16. One end of shaft46 carries a circular cutting blade 48 which is rotated in a planeparallel to the axis of shaft 16.

A bottom plate 50 carries a slot 52 through which a 3,273,236 PatentedSept. 20, 1966 portion of blade 48 extends. One end 60 of plate 50carries a vertical member 62 which is screwed to casing 40. The otherend 64 of plate 50 carries a second vertical member 66 having a slot 72.An end plate 68 is screwed to casing 40 and receives a bolt 70 extendingthrough slot 72. By loosening bolt 70, the end 64 can be raised orlowered by shifting the position of slot 72 with respect to bolt 70,whereby the depth of cut of blade 48 into cable armor can be set, bolt70 being thereafter tightened to hold the desired set.

While I have described my invention with particular reference to thedrawing, my protection is to be limited only by the terms of the claimwhich follows.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

An electrically operated cutter for cutting the armor of armored cablecomprising:

a first casing;

:an electric motor in the first casing and having a drive shaftconnected thereto;

a pistol griup depending downward from the first casa trigger switchmounted in the pistol grip;

means for feeding electrical energy to the electric motor and the switchsuch that closing the switch energizes the electric motor and rotatesthe drive shaft;

a second casing attached to the first casing such that the drive shaftextends into the second casing;

there being positioned in the second casing:

a first bevel gear mounted on the drive shaft;

a shaft extending transversely of the drive shaft;

a second bevel gear mounted on the shaft and engaging the first bevelgear such that the shaft rotates when the electric motor is energized;

a circular cutting wheel secured at its center to one end of the shaftsuch that it rotates in a plane parallel to the axis of the drive shaftwhen the shaft rotates;

a plate having two ends and a slot therein, afiixed at one end thereofto the bottom of the second casa portion of the circular cutting wheelprojecting downward through the slot;

means for moving the other end of the plate toward and away from thesecond casing while the one end remains afiixed to the casing such thatthe portion of the circular cutting wheel projecting downward throughthe slot varies to thereby vary the depth of cut of the circular cuttingwheel in the armor of the armored cable.

References Cited by the Examiner UNITED STATES PATENTS 2,457,417 12/1948Trautmann 3092 2,885,764 5/1959 Shulters et a1. 819.5 X 2,989,806 6/1961Davis 3090.5 3,182,532 5/1965 Oehlerking 8l9.5

WILLIAM FELDMAN, Primary Examiner.

MYRON C. KRUSE, Examiner.

